CP307
Thermal Considerations
ID 34424, Rev. 3.0
Page 6 - 7
P R E L I M I N A R Y
Volumetric flow rate
The volumetric flow rate refers to an airflow through a fixed cross-sectional area (i.e. slot width
x depth). The volumetric flow rate is specified in m³/h (cubic-meter-per-hour) or cfm (cubic-feet-
per-minute) respectively.
Conversion: 1 cfm = 1.7 m³/h; 1 m³/h = 0.59 cfm
Airflow
At a given cross-sectional area and a required flow rate, an average, homogeneous airflow
speed can be calculated using the following formula:
Airflow = Volumetric flow rate / area.
The airflow is specified in m/s = meter-per-second or in fps = feet-per-second, respectively.
Conversion: 1 fps = 0.3048 m/s; 1 m/s = 3.28 fps
The following figures illustrate the operational limits of the CP307 taking into consideration
power consumption vs. ambient air temperature vs. airflow rate. The measurements were
made based on a 4HP slot and with both processor cores enabled.
Figure 6-3: Operational Limits for the
CP307 with Core™ Duo 1.2 GHz
Volumetric Flow Rate (CFM)
Volumetric Flow Rate (m /h)
3
Airflow (m/s)
100% TDP
recommended
operating range
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